Just here to say thank goodness for the EFF. I support them, and if you live a cushy life like I do and have the money, you should too.

They've had these systems since the 90's. There's a documentary about a guy that got caught from one of these its on Netflix. I forget the name. If I remember I will edit this. He went through an insane amount of court documents and files to uncover LE has been illegally using Stingray systems and other custom made devices in cars for decades. They pinpoint physical location down to the square foot.

And this is why if you MUST take your phone somewhere "important", you leave it off until it's needed-- preferably battery disconnected, if your model still allows you access. Location data can blow an alibi just as surely as it can make one.